Keukuk Northern Line Packet Company. "The Upper Mississippi: A Guide to the Famous Summer Resorts of Minnesota and Wisconsin." (St. Louis: David Edwards and Company, no date);
Online facsimile at:
http://scriptorium.lib.duke.edu/eaa/ephemera/A05/A0592/A0592-05-72dpi.html;
Visited on: 3/31/2015